Asahi lives with her kind husband Koichi and father-in-law Haruo. His father-in-law, Haruo, was kind to Asahi and told Asahi that he wanted to see his grandson soon. However, Haruo learns that Asahi is unsatisfied with the couple's relationship with Koichi, and attacks Asahi one morning when he sees Koichi off to work... Then, every day after that, when the two of them were alone, he repeatedly committed obscene acts.